kyrides



rug. 5, 1924.

srAr s QPA'EENT tJFFltI Lil it P. KYRIDES, BUFFALO, NEE/l7 YORK. ASSIGNOR TO NATIONAL ANILINE & IEMICAL COMPANY, INS llIuW YORK, N. 1,, A GOBPORATIO'N OF NEW YORK.

TRIPHENYLMETHANE DYES.

Mo Drawing.

To oZZ lo/2.0m may concern l it known that 1, Lucas P. Krnrnns ose name was changed by judicial dei'roin Louis l Hymn irons), a citizen of the United. tes, residing at Buffalo, in the county of Erie, State of New York, have invented certain new and useful. lin- )ioveinents in Triphenylmethane Eyes; and do hereoy declare the following to be a else. and exact description of the inv ntion, such as will enable others skilled in the art to which it appertaius to malls and same.

111s invention relates to new dyes which belong, to the triphenylmethane group and Application filed March 19, 1922.

Serial No. 542,748.

in which R denotes an alliyl radical, :0 a hydrogen or an alkyl group, and Y a hydrogen. or an alkyl or a iota-hydroizyethyl radi *al. lhe following specific examples will illustrate the invention, but it is understood. that the invention is not limited thereto.v

Ei imple 1: 30 kilos of diethyldibenzyh diaininodiphenylmethane disulphonic acid are dissolved in 250 liters of hot water containing about 3.64: kilos of caustic soda. The solution thus obtained should give a faint alkaline reaction with phenolphthalein as indicator. The solution is diluted with ice Water (ice and water) to about! 500 liters, cooled to about 20 (l, and while being vigorously agitated, there is added to it a solution of 15.0 kilos of sodium dichroniate in 50 liters of water 20 G. Then solution of 7.7 kilos beta-hydroXyethyl-o-toluidine dis solved in 22 liters of sulfuric acid, sp. gr. 1.095, is added, the mixture diluted to about 600 liters and vigorously agitated at room temperature for about 18 hours, or until the reaction is completed. lVhen the reaction is complete, the precipitate is separated by filtration and from the filtrate the dye is precipitated either by the addition. of common salt (preferably at C.) or of sodium sul- The new dyestuffs produced as described above, in. the form of their sodium salts and in the dry and powdered state, are bronzecolored powders with a violet tinge. They are easily soluble in water with a reddish violet color which solution remains unchanged by the addition of a little caustic alkali but turns to a blue color upon the addition of a little hydrochloric acid. They are less soluble in alcohol than in water, and are insoluble in ether. They dissolve in concentrated sulfuric acid to an orangeyellow color which solution upon dilution with water passes to a green, and finally, upon further dilution, to a blue color, the dye remaining in solution.

The new dyestuffs dye Wool, silk, and other animal fibres, as well as union fabrics composed in whole or in part of these fibres, producing in general reddish; violet shades which are fast to washing and to fulling, Union fabrics composed of cotton and wool exhaust well in a. neutral bath and leave the cotton substantially unstained,

The dyed materials produced by the action of the dyestuffs themselves or lakes thereof on the fibre or fabric, as well as the new dyestuffs themsel 'es or lakes thereof, form a part of the present invention.

l claim:

1, As new products, the herein described new dyestuffs having in the free state the following probable formula:

wherein R denotes an alkyl group, 00 either hydrogen or an alkyl group, and Y either hydrogen or an alkyl or a beta-hydroxyethyl group, said products, in the form of their sodium salts and in the dry and powdered state, being bronze colored powders easily soluble in Water to give reddish violet solutions which remain unchanged by dilute alkali but give a blue color with dilute hydrochloric acid, less soluble in alcohol, insoluble in ether, soluble in concentrated sulfuric acid giving orange-yellow solutions which upon dilution with water first give green and, finally, blue shades, the dye remaining in solution.

2, new dyestutl having in the free state the following probable formula:

changes to a green color and, finally, to a blue color, the dye remaining in solution; and dyeing wool and other animal fibres, or mixtures of the same, reddish violet shades.

Materials dyed with the new dyestuffs of claim 1.

4-. Materials dyed with the new dyestufl' of claim In testimony whereof I affix my signature.

LUCAS P KYRIDES.

As a new product, the herein described P 

